Armour is a Republican stronghold. About 21% of voters here vote Democratic and 79% Republican.
About 84% of adults in Armour typically vote, above the U.S. average of about 62%. Among adults in Armour, ~18% vote Democratic, ~66% Republican, and ~16% don't vote. The map below shows estimated turnout by block group.
How Armour compares
Among cities within 25 miles, Armour leans more Republican than 6 of 17 neighbors.
Armour runs about 30 points more Republican than South Dakota as a whole.
Politics vary noticeably by neighborhood within Armour. The northwest side is the most Republican-leaning (R+74) and the southwest side is the least Republican-leaning (R+45), a spread of about 29 points.
Why Armour leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Armour, not a ranked or complete list of what matters most.
Armour votes Republican even though it is densely developed (about 40%, far above the South Dakota average of 9%). State and regional patterns outweigh the Democratic lean that density usually predicts here.
Cancer-screening access and voter turnout
Places with high colon-cancer-screening access tend to turn out at a higher rate; Armour, SD sits above the national average on this measure. Cancer screening does not drive turnout; it reflects income, insurance, and healthcare access.
Why turnout in Armour looks the way it does
Turnout in Armour sits close to the national pattern. Routine healthcare access, homeownership, education, and food security all land near their national averages here. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Corsica, SD R+72
- Delmont, SD R+65
- Ravinia, SD R+40
- Harrison, SD R+71
- Hillside, SD R+71
- Lake Andes, SD R+44
- New Holland, SD R+70
- Wagner, SD R+19
- Geddes, SD R+66
- Stickney, SD R+60
Cities with Similar Populations
- Kanawha, IA R+52
- Oakville, VA R+42
- Star City, IN R+57
- Bloomingdale, NY D+14
- Westphalia, MO R+75
- Wykoff, MN R+40
- Hainesville, NJ R+39
- Spruce Head, ME D+5
- Grand Isle, LA R+61
- Grant City, MO R+60
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from South Dakota Secretary of State, Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.